By the way,

来源: 于 2011-06-16 19:20:46 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

绿卡上面的照片 will be the one which is taken during the fingerprinting, not the one your parents provide for the I-485/I-130 filing. So, your parents may 染成黑发 just before they do the fingerprinting if they want to.